BioMedicine-Taiwan最新文献

{"title":"Circadian rhythms and neuroendocrine dysregulation in ADHD: Therapeutic insights from omega-3 fatty acids.","authors":"Ayesha Zafar Iqbal, Patricia Marest Suwindi, Sunny Yin-Shan Chen, Lindsay Liang-Tien Cho, Kuan-Pin Su, Jane Pei-Chen Chang","doi":"10.37796/2211-8039.1679","DOIUrl":"10.37796/2211-8039.1679","url":null,"abstract":"<p><p>Attention-deficit hyperactivity disorder (ADHD) is a common neurodevelopmental condition often accompanied by circadian rhythm disturbances, particularly delayed sleep phase. These involve suprachiasmatic nucleus (SCN) dysregulation, altered melatonin secretion, and hypothalamic-pituitary-adrenal (HPA) axis activity, which may be exacerbated by artificial light exposure. Genetic studies further implicate circadian mechanisms, linking ADHD with polymorphisms in clock genes such as <i>PER</i> and <i>CLOCK</i>. Nutraceuticals, particularly omega-3 polyunsaturated fatty acids (n-3 PUFAs), have been proposed as modulators of circadian rhythms. N-3 PUFAs are essential for brain health and may influence melatonin synthesis and sleep-wake regulation. Preclinical and clinical findings suggest that supplementation can improve cognitive and behavioral outcomes in ADHD, possibly through circadian pathways, though direct clinical evidence remains limited. This review integrates findings on melatonin and cortisol dysregulation in ADHD and evaluates n-3 PUFAs as potential non-photic zeitgebers. N-3 PUFAs may modulate circadian clock genes in the SCN, restore rhythm synchronization, normalize melatonin secretion, stabilize HPA axis activity, and reduce systemic inflammation. Future research should focus on well-designed trials to clarify the circadian effects of n-3 supplementation in ADHD.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 4","pages":"14-29"},"PeriodicalIF":3.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12788881/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145953929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prophylactic effect of omega-3 polyunsaturated fatty acids monotherapy in preventing recurrent major depressive disorder: A randomized controlled trial.","authors":"Ikbal Andrian Malau, Cheng-Ho Chang, Wei-Jen Chen, Wen-Chun Liu, Halliru Zailani, Hsien-Feng Liao, Jane Pei-Chen Chang, Wei-Che Chiu, Kuan-Pin Su","doi":"10.37796/2211-8039.1667","DOIUrl":"10.37796/2211-8039.1667","url":null,"abstract":"<p><strong>Background: </strong>Omega-3 polyunsaturated fatty acids (n-3 PUFAs) have demonstrated efficacy as adjunctive treatment for MDD. In fact, fewer studies assessed the prophylactic properties of n-3 PUFAs as monotherapy on the recurrence of MDD.</p><p><strong>Aims: </strong>This study aimed to assess the prophylactic effect of n-3 PUFAs monotherapy against recurrent MDD.</p><p><strong>Methods: </strong>We conducted a 6-month randomized controlled trial to assess the prophylactic effect of n-3 in preventing recurrent MDD. We assigned 60 remitted MDD patients to the n-3 group (n = 30) and placebo (n = 30). Furthermore, we assessed the difference in depression severity and MDD recurrence based on the 21-item Hamilton Rating Scale for Depression (HRSD) at months 1, 2, 3, 4, and 6 between groups. The recurrent event of MDD was defined as an HRSD score >20. Furthermore, biochemical parameters in plasma were assessed as the secondary outcomes.</p><p><strong>Results: </strong>There was no significant difference in the HRSD score between the n-3 group and placebo each month ( <i>p-</i>value >0.05). However, our findings have implicated that omega-3 monotherapy for MDD contributed to a lower recurrence rate compared to the placebo group at month 6 ( <i>p</i>-value = 0.035). Omega-3 supplementation was superior to placebo to preventing recurrent MDD analyzed using Kaplan-Meier survival analysis over a 6-month study period ( <i>p-</i>value = 0.041). In comparison, the eicosapentaenoic acid (EPA) plasma level of the n-3 group at the end point of study was significantly higher than the placebo ( <i>p</i>-value = 0.023), but not for docosahexaenoic acid (DHA) ( <i>p</i>-value = 0.119).</p><p><strong>Conclusion: </strong>Our study concluded that n-3 PUFAs monotherapy demonstrated a prophylactic effect on the recurrence of MDD.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 4","pages":"40-49"},"PeriodicalIF":2.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12788876/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145953450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of garcinol against arsenic-induced neurobehavioral alterations and liver and kidney dysfunction in albino mice.","authors":"Abdulmohsen I Algefare, Manal A Alfwuaires","doi":"10.37796/2211-8039.1650","DOIUrl":"10.37796/2211-8039.1650","url":null,"abstract":"<p><p>Prolonged exposure to inorganic arsenic is commonly linked to brain damage via oxidative and apoptotic processes. The compound garcinol (GCL) has garnered significant interest because of its beneficial effects on human health. However, the protective ability of GCL against arsenic-induced toxicity in the brain remains unexplored. Therefore, our study aimed to examine the neuroprotective effect of GCL against the adverse impact of sodium arsenite (SA) on behavioral patterns, molecular mechanisms, apoptotic markers, and oxidative stress parameters in the brain, liver, and kidneys of mice. The mice were categorized into four distinct groups for 28 days: Group I, referred to as the Control group, received a 5 % v/v solution of dimethyl sulfoxide (DMSO); Group II, referred to as the SA group, received a dosage of 20 mg/kg of SA; Group III, referred to as the SA + GCL group, received a combined dosage of 20 mg/kg of SA and 50 mg/kg of GCL; and Group IV, referred to as the GCL group, received a dosage of 50 mg/kg of GCL. Following drug administration, the behavior of the animals was evaluated and analyzed. Additionally, the levels of acetylcholinesterase (AChE), ATP hydrolysis, and angiotensin I-converting enzyme (ACE), which are associated with cognitive function, were examined. Our study demonstrated that the administration of GCL enhanced cognitive behavior. Additionally, GCL mitigated cholinergic deficits as evidenced by a reduction in AChE activity. Furthermore, GCL increased the signaling of glycogen synthase kinase 3 beta (GSK3β) and cAMP response element-binding protein (CREB) in SA-treated mice, enhanced redox equilibrium, and protected against oxidative damage caused by SA in the brains of mice. This effect was mediated by the activation of nuclear factor erythroid 2-related factor 2 (NRF2)/heme oxygenase-1 (HO-1) proteins, resulting in a significant decrease in malondialdehyde concentration. Thus, this preclinical study showed that treatment with GCL ameliorated neurobehavior, modulated cognitive function-associated biomarkers, and protected mice from SA-induced neurotoxicity.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"44-59"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513395/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Covered stent salvage for iatrogenic vertebral artery injury in traumatic cervical spine injury: A case report and literature review.","authors":"Tzu-Hao Yen, Wei-Liang Chen, Ying-Lin Tseng, You-Pen Chiu, Hui-Ru Ji, Jeng-Hung Guo, Cheng-Di Chiu","doi":"10.37796/2211-8039.1670","DOIUrl":"10.37796/2211-8039.1670","url":null,"abstract":"<p><p>We report the case of a 70-year-old woman who sustained complex traumatic injuries in a motor vehicle accident, including cervical spine fractures and a high suspicion of traumatic vertebral artery injury (VAI). Initial digital subtraction angiography (DSA) revealed no evidence of vertebral artery (VA) involvement. She subsequently underwent anterior cervical discectomy and fusion (ACDF); however, an iatrogenic injury to the right VA occurred intra-operatively, necessitating emergent endovascular stenting for vascular repair. This case underscores the importance of comprehensive preoperative imaging, intraoperative vigilance, and coordinated multidisciplinary management in cervical spine trauma with potential vascular involvement.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"66-72"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Endoscopic management of ureteric stenosis and calculi in bilateral incomplete renal duplication: A case study.","authors":"Hafeez Sohaib Ahmad Warraich, Zirwa Younis, Jawairia Warraich, Khizra Warraich","doi":"10.37796/2211-8039.1662","DOIUrl":"10.37796/2211-8039.1662","url":null,"abstract":"<p><p>Renal duplication anomalies are one of the most frequent congenital urological conditions in the general population all over the world. Bilateral incomplete duplication, however, is exceedingly rare. We present a case of a 29-year-old female with bilateral incomplete duplex kidneys complicated by mid-ureteric stenosis on the right side and calculi in the left ureter and upper moiety of the left duplex kidney. Diagnostic imaging, including ultrasound, computed tomography (CT), and intravenous urography (IVU) confirmed these findings. The patient underwent successful bilateral ureteroscopy (URS) and left-sided retrograde intra-renal surgery (RIRS) for management of the above mentioned complications related to the duplex kidneys in this patient. Postoperative recovery was uneventful, and a further right-sided percutaneous nephrolithotomy (PCNL) was planned. This case underscores the importance of comprehensive diagnostic evaluation and individualized therapeutic strategies in managing complex urological anomalies.</p><p><strong>Categories: </strong>Urology, Radiology.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"60-65"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513393/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the association between hyperthyroidism and the risk of herpes zoster in a cohort study in Taiwan.","authors":"Shih-Wei Lai, Yu-Hung Kuo, Kuan-Fu Liao","doi":"10.37796/2211-8039.1664","DOIUrl":"10.37796/2211-8039.1664","url":null,"abstract":"<p><strong>Background: </strong>The aim of this cohort study was to investigate the association between hyperthyroidism and the likelihood of developing herpes zoster in Taiwan.</p><p><strong>Methods: </strong>Using the National Health Insurance Research Database (NHIRD) in Taiwan, we selected individuals aged 20-84 who were newly diagnosed with hyperthyroidism between 2013 and 2020 as the hyperthyroidism group. These individuals were then matched with a control group without hyperthyroidism in a 1:1 propensity score matching for sex, age, and baseline comorbidities. The occurrence of herpes zoster was tracked in both groups until the end of the study period or until a diagnosis of herpes zoster was made. The Cox proportional hazards regression analysis was used to determine the hazard ratio (HR) and 95 % confidence interval (CI) for the risk of herpes zoster associated with hyperthyroidism.</p><p><strong>Results: </strong>A total of 202,069 individuals with hyperthyroidism and 202,069 individuals without hyperthyroidism were included in the analysis. The incidence rate of herpes zoster was higher in the hyperthyroidism group compared to the non-hyperthyroidism group (6.10 per 1000 person-years for the hyperthyroidism group versus 5.53 per 1000 person-years for the non-hyperthyroidism group, incidence rate ratio = 1.10, 95 %CI = 1.07-1.14, and P value < 0.001). After adjusting for covariables, individuals with hyperthyroidism were found to have a higher risk of developing herpes zoster compared to those in the non-hyperthyroidism group (adjusted HR = 1.19, 95 %CI = 1.15-1.23, and <i>P</i> < 0.001).</p><p><strong>Conclusion: </strong>This cohort study suggests that individuals with hyperthyroidism in Taiwan may have a greater risk of developing herpes zoster compared to those without hyperthyroidism.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"36-43"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513400/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metabolomics in cancer detection: A review of techniques, biomarkers, and clinical utility.","authors":"Grisilda Vidya Bernhardt, Kavitha Liegelin Bernhardt, Janita R T Pinto, Asha Vashe","doi":"10.37796/2211-8039.1665","DOIUrl":"10.37796/2211-8039.1665","url":null,"abstract":"<p><p>Cancer poses a significant burden on global public health, contributing to high mortality rates worldwide. Ongoing diagnostic strategies have predominantly relied on imaging techniques, histopathological examination and molecular analyses which have limitations in sensitivity, and specificity. Early cancer detection is a pivotal determinant of successful treatment and patient survival rates. Metabolomic applications involve the comprehensive analysis of metabolites to understand the metabolic profile of an organism, tissue, or cell under different conditions such as lack of oxygen in tumors. The aim of this review is to provide an extensive approach of metabolomic applications in early cancer detection and to provide an overview of the strengths and limitations of metabolomic approaches in early cancer detection. Metabolomic profiling can identify specific metabolic biomarkers indicative of early-stage cancer. The identification of these biomarkers can lead to development of non-invasive diagnostic tests which can be used for early cancer screening. Several researchers have already employed the metabolomics approach for biomarker discovery, diagnosis, identifying new drug targets along with the clinical trials observations. When discussing challenges, researchers currently face a notable obstacle, the absence of standardized analytical procedures. It is imperative for the field to prioritize implementing computational tools for constructing open-source databases, thereby advancing metabolomic studies in cancer research.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"1-23"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513401/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An investigation into the potent anticancer, antimicrobial, and anti-inflammatory activities of a <i>Punica granatum</i> nanoemulgel.","authors":"Ahmad M Eid, Murad Abualhasan, Yara Khaliliya, Zeina Sinan, Aya Khaliliya","doi":"10.37796/2211-8039.1663","DOIUrl":"10.37796/2211-8039.1663","url":null,"abstract":"<p><strong>Purpose: </strong>The objective of this study is to formulate a nanoemulgel using <i>Punica granatum</i> (<i>P. granatum</i>) seed oil and study the antibacterial, anticancer, and anti-inflammatory properties.</p><p><strong>Methods: </strong>The process to formulate a nanoemulsion from <i>P. granatum</i> seed oil involved using the self-nanoemulsifying technique, with Span 80 and Tween 80 serving as the emulsifying agents. Carbopol hydrogel was combined with the nanoemulsion to produce the nanoemulgel. The particle size, polydispersity index (PDI), rheological behavior, antibacterial, cytotoxic, and anti-inflammatory properties were subsequently examined.</p><p><strong>Results: </strong>The nanoemulsion formulation with a PDI of 0.229 and a particle size of 189.44 nm was identified as the optimal formulation. The <i>P. granatum</i> seed oil nanoemulgel showed significant effects on MRSA, <i>K. pneumoniae</i>, and <i>C. albicans</i>, with zone inhibition diameters of 29 ± 1.1 mm, 26 ± 1.8 mm, and 18 ± 0.7 mm, respectively, and significant activity against LX-2, B16-F1, Hep-3B, and HeLa cancer cell lines with IC₅₀ values of 169.82 ± 2.7, 39.81 ± 0.8, 61.65 ± 1.2, and 25.11 ± 1.3 μg/mL, respectively, which were superior to those of the original oil. Regarding its anti-inflammatory effects, <i>P. granatum</i> seed oil demonstrated activity against both COX-1 and COX-2, with greater selectivity for COX-1.</p><p><strong>Conclusions: </strong>Consequently, a novel <i>P. granatum</i> seed oil nanoemulgel was developed, representing a promising step forward in the development of pharmacological dosage forms.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 3","pages":"24-35"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513398/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Staged-OLIF approach can minimize construct lengths in adult spinal deformity- A case series and literature review.","authors":"Guna Pratheep Kalanchiam, Alexander Shao-Rong Pang, Jacob Yoong-Leong Oh","doi":"10.37796/2211-8039.1648","DOIUrl":"10.37796/2211-8039.1648","url":null,"abstract":"<p><strong>Background: </strong>Adult Spinal Deformity (ASD) is one of the challenging conditions to treat for spine surgeons. One of the important dilemmas in the management of these patients is the decision on the number of levels of instrumentation and the overall length of the construct. OLIF has the advantage of providing a minimally invasive approach to address this complex pathology also allowing us to stage the procedure and thus help clinicians reassess if the patient requires an additional decompression, long fusion lengths, or need for osteotomies.</p><p><strong>Aim: </strong>Our study aims to evaluate the possibility of minimizing the construct length following a staged OLIF approach in ASD patients and also to analyze the clinical and radiological outcomes following a staged OLIF surgery.</p><p><strong>Methods: </strong>We present three cases of ASD, where the patients had a significant imbalance in either the coronal/sagittal profiles, and by using a staged approach, the surgeon was able to reduce the construct lengths and also operate on these deformities using an all Minimally Invasive Surgery (MIS) approach.</p><p><strong>Results: </strong>Overall sagittal and coronal profiles improved in all three cases with satisfactory fusion rates and VAS scores (back pain) post-operatively. Two of the three patients had an all-MIS approach (OLIF with MIS Ponte osteotomy and robotic guided pedicle screw instrumentation) and in one patient a four-rod construct was preferred to improve the stability. No complications were observed during a mean follow-up period of 4 years.</p><p><strong>Conclusion: </strong>A staged approach in ASD (lateral OLIF and posterior instrumentation) is a valuable surgical strategy for better correction of the coronal and sagittal plane deformities with relatively lesser construct length. It reduces the problems associated with prolonged anesthesia, in addition, it helps the surgeon in reassessing the pelvic parameters, thereby helping to decide on the need for additional osteotomies during the second procedure.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 2","pages":"34-42"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513403/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyclohexylamine, the principal metabolite of cyclamate, contracts the epididymal vas deferens of rats by affecting endogenous catecholamine release via postsynaptic α_1A- and presynaptic α₂-adrenoceptors in a calcium-dependent manner.","authors":"Yuh-Fung Chen, Yu-Wen Wang, Huei-Yann Tsai","doi":"10.37796/2211-8039.1653","DOIUrl":"10.37796/2211-8039.1653","url":null,"abstract":"<p><strong>Background: </strong>Cyclohexylamine (CHA) is a principal metabolite of cyclamate, which was once one of the most prominently consumed non-sugar sweeteners. Earlier studies suggested that long-term use of cyclamate might be carcinogenic and genotoxic; however, no consistent evidence supports an association between cyclamate and cancer risk. However, this issue remains interesting. Cyclamate can be metabolized to CHA by the intestinal bacteria in humans and some animals. Previous reports indicated CHA could induce atrophy of rat testes and affect rat fertility, as well as contract rat vas deferens. However, the contractile mechanisms of CHA on rat vas deferens remains poorly understood. This study investigated the contractile mechanisms of CHA on the isolated rat epididymal portion of the vas deferens.</p><p><strong>Methods: </strong>Male S.D. rats weighing between 200 g and 250 g were used. The isolated epididymal portion of rat vas deferens was added to calcium-channel blockers, calcium-free conditions or various concentrations (1 × 10^-8 M-1 × 10^-5 M) of adrenergic antagonists and CHA (1 × 10^-4 M).</p><p><strong>Results: </strong>CHA (1 × 10^-5 M-1 × 10^-1 M) evoked a concentration-dependent contraction. Calcium-channel blocker, nifedipine (1 × 10^-8M-1 × 10^-6 M) or verapamil (1 × 10^-8M-1 × 10^-5 M) pretreatment, dose-dependently attenuated the CHA (1 × 10^-4 M)-induced contraction. The calcium-free condition completely blocked CHA (1 × 10^-4 M)-induced contraction. Prazosin (1 × 10^-8M-1 × 10^-6 M) or yohimbine (1 × 10^-7 M-1 × 10^-5 M) pretreatment or treatment could inhibit contractions evoked by CHA (1 × 10^-4 M) in a dose-dependent manner. Moreover, the effect of CHA (1 × 10^-4 M) was entirely blocked by combining prazosin and yohimbine pretreatment. WB4101 (1 × 10^-8 M) could completely inhibit the contractions induced by CHA (1 × 10^-4 M). CEC (1 × 10^-8 M-1 × 10^-4 M) showed no significant inhibitory effect on the contractile tension but reduced the frequency induced by CHA (1 × 10^-4 M). Moreover, reserpine (1 × 10^-5 M) showed a significant inhibition on the contractions of CHA (1 × 10^-4 M).</p><p><strong>Conclusions: </strong>From the above results, CHA-contracts epididymal vas deferens of rats by affecting endogenous catecholamine release via postsynaptic α_1A- and presynaptic α₂- adrenoceptors and are calcium-dependent.</p>","PeriodicalId":51650,"journal":{"name":"BioMedicine-Taiwan","volume":"15 2","pages":"22-33"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513396/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145281712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}